Door-bolt.



PATBNTED MAY 5, 190B.-

P. A. TOMKINS.

DOOR BOLT.

APPLIUATION FILED 213.25. 19o?.

MyWay/s.

UNTTED STATES PATNfr muon DOOR-BOLT. l

Specification of Letters Patent.

Application filed February 25, 1907.

Patented May 5, 1908.

Serial No. 359,227.

To all whom it may concern.'

Be it known that I, FREDERICK ARTHUR ToMxiNs, a citizen of the UnitedStates, and resident of Brooklyn, county of Kings, and State of NewYork, have invented certain new and useful Improvements in Door-Bolts,of which the following is a specification, reference being had to theaccompanying drawing, forming a part thereof, in which similar lettersof reference indicate corresponding parts.

This invention relates to door bolts of the class especially adapted tobe placed in vertical position with the bolt extended upwardly; theobject of the invention being to provide a device of this characterwhich is susceptible of being maintained in bolted or locked relativearrangement, in such a secure manner as to obviate liability ofaccidental displacement, by reason of vibration or jarring of the partsto which the bolt is attached, the device being especially applicablefor use as a means for fastening doors on steam ships or similar vesselswhose parts are subject to constant vibration.

The invention will be hereinafter fully described and specifically setforth in the annexed claims.

In the accompanying drawings forming part of this specification, Figure1, is a face view of my im rov'ed door bolt Fig. 2, a verticalsectionai) elevation taken on the line 2 2, of Fig. 1 and Fig. 3, is asectional plan view taken on the line 3 3, of Fig. 1.

In the example of my invention as illustrated by the drawings, the boltproper embodies the cylindrical extended part 1, and elongated plate 2;the latter named part being journaled through the guide or box 3, andthe former through a laterally extended flange a, of the main plate A,which is adapted to be counter-sunk -into and secured to a door by meansof screws, which pass through the screw-holes 4.

On the plate 2, and bearing against the inner surface of the plate A,are cross-ribs 5, which bear against the plate A, to prevent frictionalcontact between the part 2, and said plate A, whereby the bolt may slidefreely with a minimum of frictional contact; the back of the part 2, ofthe bolt contacting with a plate-spring 6, which is secured to the rearwall of the box 3. Thus the bolt may be freely moved back and forth,while at the same time it is maintained in perfect alinement. As a meansfor operating the l bolt a lug 7, is extended forwardly from the plate2, and guided through a slot 8, in the plate A. The said lug 7, acts asa handle for operating the bolt, and also provides a shoulder forengagement over a swinging latch B, which is secured between upper andlower flanges 9, of the plate A, by means of the pivot 10. The saidlatch is provided with a groove 11, which is located adjacent to arecess 12, formed in that part of the plate A, adjacent to the slot 8,whereby a finger or thumb may be readily inserted to operate the latch.

In the operation and use of the device, when it is desired to lock thedoor to which it is attached, the bolt is shot into a locked position asshown in the drawings, the free or outer end of same engaging a socket,as C, Fig. 2, ofthe drawings, which is countersunk into the door framein alinement with the cylindrical end of the bolt. Then the latch B, isswung into engagement with the lug 7, as shown in Fig. 1, of thedrawings, which prevents the bolt from accidentally sliding back out ofengagement with its vsocket through the medium of any jarring action orvibrations of the adjacent parts of the structure. To `unbolt the doorit is simply necessary to swing the latch B, into position shown by Fig.3, of the drawings, which leyes the handle or lug 7, perfectly access1e.

I do not confine myself to the specic details of construction andformation of arts as herein shown and described, as I be ieve under thescope of my invention I am entitled to slight variations. y

lNhile I have illustrated mys invention as especially applicable forvertical bolts on steam ships, I may use it in horizontal position also;further, it may be employed in connection with doors of buildings aswell as floating vessels. The device would be especially applicable foruse on doors in factory buildings where the employment of heavymachinery causes constant vibrations of the structure. The device alsoacts as a burglarproof fastening for doors, as it can not be opened byshaking the door.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. As a door fastener, the combination of a supporting plate having aguide for a bolt on one end thereof, a slot and a bearing box near theother end thereof, of a sliding bolt IOO llO

having an extended lug and a latch hinged to iianges on said plate in aposition transverse to said bolt and swinging at right angles thereto,and engaging said lug, substantially as shown and described.

2. As a door fastener, the combination of a supporting plate having aguide for a bolt on one end thereof, a slot and a bearing-box near theother end thereof, and a sliding bolt having a cross rib and lug, and alatch hinged to flanges integral With said plate in a positiontransverse to said bolt, swinging at right angles thereto, and engagingsaid lug, snbstantially as shown and described.

3. As a door fastener, the combination of a supporting plate having abolt guide at one end thereof, a bearing box, a transverse slot,

a groove and a recess near the other end thereof, and a spring Withinsaid box engaging a bolt, of a sliding bolt engaged by said springhaving an extended lug, and a latch hinged to parallel flanges on saidplate in a position transverse to said bolt swinging at right anglesthereto and engaging said lug, substantially as shown and described,

In testimony that, I claim the foregoing as my invention, I have signedmy name in presence of two Witnesses, this 18th day of February 1907.

FREDERICK ARTHUR TOMKINS.

Witnesses:

C. C. Dow, 'LoUIs H. R. BRoDIE.

